diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 8882ecc..0120247 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -15,6 +15,7 @@
 #include <linux/fs.h>
 #include <linux/sched.h>
 #include <linux/namei.h>
+#include <linux/slab.h>
 #include <linux/mount.h>
 #include <linux/tty.h>
 #include <linux/mutex.h>